166 BOTANY. 



one much longer than the ethers, 4' long and 3" wide ; upper leaves sessile, 

 3-parted; outer series of involucral scales lanceolate, filiate, as long as the 

 broadly margined inner series. Flowers in my specimen are all too young. 

 Mi Watson has kindly compared it for me, and pronounces it the same as 

 1233 of Mr. Wright's collection. 



Laphamia Stansburii, Torr. — Utah. 



"Laphamia megalocephala, Watson (Amer. Naturalist, 7, 301). — 

 Scabrous-pubescent; stems diffusely branched, a foot high ; branches sim- 

 ple ; leaves alternate, broadly ovate, 2-3 lines long, smaller upon the 

 branches, entire, very shortly petioled ; heads large, 2-3 lines in diameter, 

 terminal and solitary, discoid, many-flowered ; achenia compressed, hispid ; 

 pappus none. — With nearly the habit of the last. Nevada." I have 

 quoted the description from Mr. Watson. The specimen I have not seen. — 

 Plate XI. Figure 1. A branch, natural size. 2. A single flower. 3. Style 

 and stigma. 4. . 5. Stamen. Enlarged about 10 diameters. 



Perityle* Emoryi, Torr. (Bot. Mex. Bound, p. 82). — "Sparsely hirsute 

 as well as glandular : leaves round-cordate or fan-shaped in outline, 5-9- 

 cleft and the lobes copiously incised, the upper alternate and less lobed : 

 scales of the involucre rather broad : rays short, white, broadly oval : style- 

 appendages oblong and obtuse: akenes narrowly oblong, hispid- ciliate: 

 awn of the pappus only one, very slender, sparsely barbellate above" 

 (Gray in Fl. Cal. 1, p. 397). I have not seen the species. Arizona. 



RiDDELLiAf Cooperi, Gray (Proc. Amer. Acad, vii, p. 358). — "A foot 



* "Perityle, Bentli. — Heads many-flowered, with pistillate rays, or occasionally none ; the Bowers 

 all fertile. Involucre campanulate, of nearly equal scales, sligbtly carinate on the back, iu a single or 

 double series. Receptacle flattisb or conical, naked. Rays 3-tootbed ; disk-corollas 4-toothed J the tube 

 glandular. Style-branches tipped with (or insensibly changing into) a short and obtuse or more com- 

 monly subulate or filiform, hairy appendage. Akeues oblong, flat (laterally compressed), dark-colored, 

 bordered by a cartilaginous mostly ciliatc-bearded margin. Pappus a series of hyaline or setiform 

 scales, usually more or less united into a cup or crown, and commonly a Blender awn from one or both 

 margins.— Rays white (or sometimes yellow f): disk-flowers yellow."— Gkay, PL Cal. 1, p. 39G. 



tRiDDELLiA, Nutt.— "Heads several-flowered, with 3 or 4 pistillate rays aud 5 to IS disk- 

 flowers, all fertile. Involucre narrow, cylindraceous, of 4 to 10 linear-oblong aud coriaceous equal 

 woolly scales, which are connivent but distinct, except at the very base, and a few thinner or 6carious 

 ones within, sometimes a narrow external bract or two. Receptacle flat, miked and smooth. Rays 

 large for the size of the bead, very broad, abruptly contracted at the base into a short tube, truncate and 

 3-lobcd at the end, 5-7-nerved (the nerves converging and uniting in pairs within the lodes), becomiug 

 papery, persistent on the akene. Disk-corollas elongated-cylindraceous, with a very short proper tube, 

 f>-toothed at summit; the teeth glandular. Anthers linear, minutely sagittate, OX emarginate at base. 



